Bolt a LoudMouth® Axle-Back Exhaust System onto your 2009-2013 C6 Corvette/Grand Sport for gains up to 12 extra horsepower. The tone is rich and powerful letting everyone know you're coming, with an aggressive rumble your LS3 deserves. The secret to the system's distinctive sound and performance gains are a pair of polished stainless SLP Resonators, stamped with our SLP logo. This system features four polished 3.5" dual split round tips, providing you with the ultimate Corvette look. The modular design gives you flexibility to change to quieter SLP Bullet-Style Mufflers (#31063). The rest of the exhaust system is hand-crafted from 2.5" 304 stainless steel, and is covered with our Limited Lifetime Warranty.